Ball-bearing pulley



Patented Sept. 20, 1921.

FREDERICK J. LEMLEY, 'or calorico, ILLINOIS. Y

BALL-BEARING- IPULLEY.

To all whom t may concern:

Be it known that I,FREDER1QK J. LEM- LEY, a citizen of the United States, residing 'inChicago, Cook county,-Illinois,have inadapt the sleeve tomeet slight variationsinthe dimensions ofthe pulley hub and to.

avoid the necessity for extreme precision in theA finishing ofv certain of the parts. The invention consists in the features of `construction, and combination of parts hereinafter described, and claimed.

In the drawings, Figure 1 is a sectional elevation of the ball bearing pulley of the present invention, showing the sleeve members in elevation, and Figs. 2, 3 and 4 are elevations showing modified arrangements of the sleeve sections.

The pulley of Fig. 1 is carried upon a lshaft 10 on which are mounted the sleeve sections 11 and 12 respectively. The sleeve Sections are bored to fit snugly upon the vshaft and the sleeve section 11 is provided with a split extension 12 which receives a collar 13, having entered therethrougha set screw 14 adapted to be screwed down to compress the split end of the sleeve section into clamping engagement with the shaft.

Each of the sleeve sections at its inner end is provided with an enlarged head 1 5, `each of the heads being Ashouldered on its.

Application filed-December 18, 1919. Serial No. 345,688.

bau bearing y puivSpecifmatien of Letters Patent.' Patented Sept. 20, v1921.l

UNITED ,STATES PATENT. .oFFlcI-L `Each of the, innerA .runwaysv coperates l with an outer ring shaped runway 19, the

ball bearing 20 being interposedv between`v two runways. Each of the outer runways is held in adjusted. position by thecontact' ofa flange 21'jformed on the inner face of a flange ring 22, the outer margin of which abuts against the face of the hub 23 of the' pulley 24.A T he flange rings are held in position at opposite ends of' the hub by means of bolts 25 which clamp the parts to- L gether, and hold the flange .rings into proper engagement with the rbearing runways which latter are thus held in a fixed position between the bearing rings and the sleeve` shoulders. The bearing rings on their inner edges are recessed to provide for the insertionv of a suitable lpacking 26,

which serves to retain a lubricant and to exclude dust from the bearings.

InF ig. 2 the sleeve heads are formed to provide engaging faces of a male and female formation 27, and in Fig. 3 the sleeve heads are provided with flanges 28 held in spaced relation by means of connecting bolts 29, or the like. In Fig. 4, there. is still another interlock shown in which an intermediate interlocking member 30 is employed having on each of its faces a male and female engagement withv the adjacent sleeve head.

From the foregoing description, it will be seen that the formation of the sleeve sections is such that the parts may be readily assembled and the bearing elements accurately fitted'to co-act with-one another with out the necessity for extreme accuracy in the fitting of the sleeves, which are designed to adjust themselves to the requirements of the bearing members. In claims where an interlock is referred to, it will be understood that this language is intended to cover any form `of connection'between the sleeve heads which adapts the sleevesy to adjust themselves to one another whether the same be affected by direct engagement of the heads with one another or by the employment of an interposed member of the character illustrated in Fig.4.

The desirability of providing aslight clearance between the interlocking sleeve sections will be further appreciated when it is understood thatI in assembling the ball runways it is of primary importance to maintain the inner and outer runways in eXact valineiiient, sincera slight end thrust in efciency of `the ball bearingsfor anti-fric? tion purposes. In assembling itis 'customary to Aforce the inner. runway of ai pair into position on its sleeve, and in doing this the pressure will be applied solely to the inner runway, theouter Vrunway being free from' pressure. Thereafter, the parts'thus assembled lare forced intoplace within thehub ofthe pulley, and with this operation' the pressure wil e lapplied solely to the'outer runway of thev pair, the inner runway and such an assembling ofthe parts vcannot be itsl sleeve n'ow vbein-g free to adjust themselves to the positionrequired for a proper aliniiig ofthe outer-runway.

lVithout the provision of a sectioned sleeve practised', and diiliculty is frequently experienced in properly assenibliiigthe part-s,` and to secure an accurate iit considerable machining is required, which is not 'necessary iii-the case. of the present invention, in

" which the parts will accurately position,

themselves to meet-slight variations inliub f length, which vvariations need not be cor- Isev I claim:

rig-eted by careful machining.

l., Ina loose pulley, the .combination of a shaft, sleeve `sectionsl mounted. on the shaft and adjustable towardand from one another and having an interlocking .engagenient, a hub, concentric ball bearing -run ways `interposed betweenthe hub and the sleeve sections and flanges on the hub, bearj ing eXteriorl 'against the outer ruuway'sr.

' g '2.- In arbal bearing ulle the combinaT sleevesy furnishing shoulders,` concentric .ball lrunwaysyin contact with the "respective tion -of af shaft, s leeve sections mounted` upon the'shaft .in sliding relation to one anothenl enlarged interlocking heads on the -l 1 shoulders, ahub enclosing the runways and v'provided f with flanges vbearing- .earried'by the hub;

1 sleeve to-'the shaft@rv i 4i lIn a 'ballrbearinglpulley, t'liecoinbinaexterio-ilyi against the outer In al loose pulley, shaft, sleeve sections mounted on the shaft andadjustable toward andA from `one anried by the. `extension for clamping the tion offra shaft, sleeve'sections mounted 'uponthe-. shaftin 'sliding relationlfto-one another,l 'enlarged Ainterlocking j heads on the sleeves furnishing.' shoulders, vcon'centrieball- "frunw'ays fin' jcontacft'- with rthe respective shouldersya" hubfinclosing'the runways provided with' flanges bearing against the. outer1 runways, and a' 'pulleyjcarried by the hub, provided witha'bored'hub'closely encircling V.between/the runways composing a pair, and

runways, and a pulley.

the combinati onof afone-ofthe sleeves being provided 'withfa either direction .would impair or destroy thel clamping collar'carried by the extension fo 'clamping 'the sleeves to the shaft.`

51' In a loose pulley, the combinationv of a shaft, vsleeve sections mounted on the'shaft and slidably adjustable towardand from one another and having an interlocking en- Y y gage'ment adapted'to prevent relative rotation, said sleeve sections being each lprovvidedwitli an exteriorly facing abutment,

an inner 'ball runway 'for each section bearing on its inner edge againstlthe adjacent abutment, an outer ball runway concentritlie coacting inner runway, balls interposed 'between the runways composing a pair, and

a hub encircling the runways and provided `-cally held in spaced relationwithrespect to cally -lield in spacedv relation with respect ,to

the coactiiig inner runway, balls'interposed a hub.encircling'the,runways and provided with na bored hub closely encircling the outer' runways., said hub being providedat each end with ,a .bearing member engaged the outer edge of the adjacent outer runway.

7; In a-'loose pulley, thecombination of a. shaft, sleeve -sections mounted' on lthe shaft and adjustable toward and from one another and" having an interlocking engagement,

said sleeve vsections being each provided with jan-exterior abutment, an inner ball" runway foreachl section bearing against. the adja- ,cent abutnient,'an outer 'b all vrrunway cong...

spect to the `co-acting innerrunway, balls `interposed between the runways composing centrically hel-d in spaced relation .with re'- a pair, and a hub encircling therunways and provided with. a bored hub closely encircling the outer runway,1said hub havingI at each. end a flange ring engaging of lthe adj aceiit' outerrunway.

8,- In a loose pulley,vtlie combination o f a.

"shaft,` sleeve sections mounted on the sha-ft`- and .adjustable toward and from one another f and having an interlocking engagement, said i15- the outer edge f sleeve sections being each p rovideded with an exterior abutment, an inner ball runway for each section4 bearing. against the adjacent abutment, an outer ballrunway .con-A ceiitrically heldin spaced relation with respectto theA coacting inner runway, balls interposed between the runways composing a pair, and a. hub encircling the runways and.

the outer runways, said hub having at each end a flange ring engagin the outer edge of the adjacent outer runway, and bored to yfit closely against the adjacent sleeve section.

9. In a loose pulley, the combination of a shaft, sleeve sections mounted on the shaft and adjustable toward and from one another and having an interlocking engagement, said sleeve sections belng each provided with an unway, said hub having at each end a flange ring engaging the outer edge ofthe adjacent outer runway, and through bolts extending longitudinally through the hub for drawing the two end flange rings into close engagementi with the respective ends of the hub.

10. In a loose pulley, the combination ofia shaft, sleeve sections mounted on the' shaft and adjustable toward and from one another and having an interlocking engagement, said sleeve sections being each provided with an exterior abutment, an inner ball runway for each section bearing against the adja-y cent abutment, an outer ball runway concentrically held in spaced relation with respect to the co-acting inner runway, balls interposed between the runways composing a pair, a hub encircling the runways and provided with a bored hub closely encircling the outer runways, said hub having at each end a flange ring engaging the outer edge of the adjacent outer runway, and bored to fit closely against the adjacent sleeve section, and through boltsv extending longitudinally through the' hub for drawing the two end flange ringsinto close engagement with the respective ends of the hub.

FREDERICK J. LEMLEY. 

